All water systems in Washington
4,692 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Eastern Washington University Spokane County |
17,108 | 0 | 0 | |
|
Port Townsend City of Jefferson County |
17,053 | 0 | 0 | |
|
Cheney City of Spokane County |
16,954 | 1 | 0 | |
|
Naval Base Kitsap at Bangor Kitsap County |
16,828 | 0 | 0 | |
|
Naval Air Station/whidbey Island Island County |
16,595 | 0 | 0 | |
|
Gig Harbor Water Dept Pierce County |
16,510 | 0 | 0 | |
|
North Peninsula Kitsap County |
16,449 | 1 | 0 | |
|
Sumner City of Pierce County |
16,438 | 1 | 0 | |
|
Snohomish City of Snohomish County |
16,367 | 0 | 0 | |
|
Chelan CO Pud 1 Chelan County |
16,190 | 0 | 0 | |
|
Coal Creek Utility District King County |
15,989 | 0 | 0 | |
|
Kelso City of Cowlitz County |
15,775 | 0 | 0 | |
|
Port Orchard Water Dept Kitsap County |
15,355 | 0 | 0 | |
|
Fruitland Mutual Water Company Pierce County |
15,313 | 2 | 0 | |
|
Shelton City of Mason County |
15,273 | 0 | 0 | |
|
Quimper Jefferson County |
14,548 | 2 | 1 | |
|
Liberty Lake Sewer & Water District Spokane County |
14,500 | 0 | 0 | |
|
Sequim City of Clallam County |
14,293 | 1 | 0 | |
|
Bainbridge Island City of Kitsap County |
13,491 | 0 | 0 | |
|
Toppenish Water Department Yakima County |
13,382 | 1 | 0 | |
|
Dupont Water System City of Pierce County |
13,141 | 2 | 1 | |
|
Skyway Water & Sewer King County |
12,036 | 0 | 0 | |
|
Beacon Hill Water & Sewer District Cowlitz County |
11,969 | 0 | 0 | |
|
Naval Base Kitsap at Bremerton Kitsap County |
11,792 | 0 | 0 | |
|
Chehalis Water Department Lewis County |
11,718 | 1 | 0 | |
|
Hoquiam Water Department Grays Harbor County |
11,456 | 0 | 0 | |
|
Duvall City of King County |
11,050 | 0 | 0 | |
|
Leavenworth City of Chelan County |
11,041 | 1 | 0 | |
|
Grandview City of Yakima County |
11,010 | 2 | 0 | |
|
Woodland City of Cowlitz County |
10,640 | 0 | 0 | |
|
Manchester Water District Kitsap County |
10,475 | 0 | 0 | |
|
Orting City of Pierce County |
10,332 | 2 | 0 | |
|
Lwwsd South Shore Water System Whatcom County |
10,028 | 0 | 0 | |
|
Cougar Rock Campground Pierce County |
9,722 | 0 | 0 | |
|
NE Sammamish Sewer & Water District King County |
9,702 | 0 | 0 | |
|
Mountain View-Edgewood Water CO Pierce County |
9,680 | 0 | 0 | |
|
Fairchild Air Force Base Spokane County |
9,544 | 0 | 0 | |
|
Airway Heights City of Spokane County |
9,489 | 1 | 0 | |
|
Consolidated Irrig Dist 19 System 1 Spokane County |
9,434 | 0 | 0 | |
|
Chelan Water Dept City of Chelan County |
9,425 | 2 | 0 | |
|
Ocean Shores Water Dept Grays Harbor County |
9,347 | 0 | 0 | |
|
Selah City of Yakima County |
9,331 | 0 | 0 | |
|
Birch Bay Water & Sewer District Whatcom County |
9,046 | 0 | 0 | |
|
Port Angeles Composite Clallam County |
8,872 | 1 | 0 | |
|
Othello Water Department Adams County |
8,755 | 1 | 0 | |
|
Union Hill Water Association INC King County |
8,720 | 0 | 0 | |
|
Ephrata Water Department Grant County |
8,718 | 2 | 0 | |
|
North Bend City of King County |
8,710 | 1 | 0 | |
|
Steilacoom Town of Pierce County |
8,545 | 0 | 0 | |
|
Sultan Water Department Snohomish County |
8,424 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Washington records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.